# Copyright 2025, Pulumi Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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from pulumi.runtime.invoke import _extract_single_value
import pytest


def test_extract_single_value():
    d = {"foo": "bar"}
    v = _extract_single_value(d)
    assert v == "bar"


def test_nondicts_return_identity():
    x = 123
    y = _extract_single_value(x)
    assert x is y


def test_empty_dicts_throw():
    with pytest.raises(IndexError):
        _extract_single_value({})
